1. 1. Mui Wo River (Southern WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Excellent 2. Shing Mun Main Channel (Tolo Harbour & Channel WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Good 3. Lam Tsuen River (Tolo Harbour & Channel WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Good 4. Tai Po River (Tolo Harbour & Channel WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Excellent Figure 3-a: Water Quality Index (WQI) & E. coli levels of the major rivers in Hong Kong E. coli in 2001 : 3,700 cfu/100mL E. coli in 2001 : 4,200 cfu/100mL E. coli in 2001 : 78,000 cfu/100mL E. coli in 2001 : 67,000 cfu/100mL

2. 5. Ho Chung River (Port Shelter WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Excellent 6. Tuen Mun River (North Western WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Good 8. Yuen Long Creek (Deep Bay WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Bad 7. Sam Dip Tam Stream (Victoria Harbour WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Excellent Figure 3-b: Water Quality Index (WQI) & E. coli levels of the major rivers in Hong Kong E. coli in 2001 : 9,100 cfu/100mL E. coli in 2001 : 31,000 cfu/100mL E. coli in 2001 : 20,000 cfu/100mL E. coli in 2001 : 1,300,000 cfu/100mL

3. 9. River Ganges (Deep Bay WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Bad 10. River Indus (Deep Bay WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Fair 11. River Beas (Deep Bay WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Fair 12. Kam Tin River (Deep Bay WCZ) Excellent Good Fair Bad Very Bad Water Quality Index Year Bad Figure 3-c: Water Quality Index (WQI) & E. coli levels of the major rivers in Hong Kong E. coli in 2001 : 120,000 cfu/100mL E. coli in 2001 : 150,000 cfu/100mL E. coli in 2001 : 42,000 cfu/100mL E. coli in 2001 : 6,500 cfu/100mL